JP5777412B2 - Air-conditioning power supply system for multi-power rail vehicles - Google Patents

Air-conditioning power supply system for multi-power rail vehicles Download PDF

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JP5777412B2
JP5777412B2 JP2011125279A JP2011125279A JP5777412B2 JP 5777412 B2 JP5777412 B2 JP 5777412B2 JP 2011125279 A JP2011125279 A JP 2011125279A JP 2011125279 A JP2011125279 A JP 2011125279A JP 5777412 B2 JP5777412 B2 JP 5777412B2
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voltage
power supply
air conditioner
auxiliary power
air
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JP2012253931A (en
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圭二 吉村
圭二 吉村
達昭 梅崎
達昭 梅崎
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2011125279A priority Critical patent/JP5777412B2/en
Priority to CN201280026855.0A priority patent/CN103561992B/en
Priority to PCT/JP2012/003494 priority patent/WO2012164907A1/en
Priority to EP12793265.5A priority patent/EP2716487B1/en
Priority to US14/111,011 priority patent/US9796271B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • B60L1/04—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits fed by the power supply line
    • B60L1/06—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits fed by the power supply line using only one supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/02—Electric propulsion with power supply external to the vehicle using dc motors
    • B60L9/08—Electric propulsion with power supply external to the vehicle using dc motors fed from ac supply lines
    • B60L9/12—Electric propulsion with power supply external to the vehicle using dc motors fed from ac supply lines with static converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B60L9/18—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B60L2210/12—Buck converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/34—Cabin temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/46—Heat pumps, e.g. for cabin heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)

Description

本発明は、多電源式の鉄道車両に搭載される空気調和機の空調電源システムに関するものである。   The present invention relates to an air conditioner power supply system for an air conditioner mounted on a multi-power supply type railway vehicle.

従来、架線の多電源化に対応するために、鉄道車両用の補助電源システムで空気調和機への電源として４００Ｖ級の三相交流電圧を供給していたが、その際、補助電源側の軽量化や省スペース化を図るために、出力部の絶縁トランスを省き非絶縁形の電源を供給している。この場合、補助電源から供給される電源波形の波高値が６００Ｖ級の矩形波となる。空気調和機は、補助電源から離れた所に艤装されるため、補助電源から空気調和機に供給される電源用の艤装線が、長いものでは４０ｍ以上になるため、空気調和機に供給される電源波形のピーク値が６００Ｖ級（波高値）の２倍以上になる可能性があることが分かっている。これは、空気調和機に使用されている電動機の巻線の絶縁破壊を助長し寿命に悪影響を与える可能性がある。
従来、空気調和機に内蔵されたインバーター装置の入力側に交流電源入力端子と直流電源入力端子を設けて２電源（交流電源/直流電源）に対応しているものがある。この場合、空気調和機に供給される電源が交流の場合、空気調和機に内蔵された整流部を経てインバーター装置から空気調和機内の電動機に供給される。また、電源が直流の場合は、インバーター装置から空気調和機内の電動機に供給されるため、電源波形のピーク値が６００Ｖ級（波高値）の２倍以上になることはなくなり、電動機の巻線の寿命に対する影響は小さくなっている（例えば、特許文献１参照）。 Conventionally, in order to cope with the increase in power supply of overhead wires, an auxiliary power supply system for railway vehicles has supplied 400V class three-phase AC voltage as power supply to the air conditioner. In order to reduce the size and space, non-insulated power supplies are supplied by omitting the output isolation transformer. In this case, the peak value of the power supply waveform supplied from the auxiliary power supply is a rectangular wave of 600V class. Since the air conditioner is installed in a place away from the auxiliary power supply, the power supply cable supplied from the auxiliary power supply to the air conditioner is 40 m or longer in the long one, and is supplied to the air conditioner. It has been found that the peak value of the power supply waveform may be more than twice the 600V class (peak value). This promotes the dielectric breakdown of the windings of the motor used in the air conditioner and may adversely affect the service life.
2. Description of the Related Art Conventionally, there is an AC power supply input terminal and a DC power supply input terminal provided on the input side of an inverter device built in an air conditioner so as to support two power supplies (AC power supply / DC power supply). In this case, when the power supplied to the air conditioner is alternating current, the power is supplied from the inverter device to the electric motor in the air conditioner via a rectifier built in the air conditioner. In addition, when the power source is DC, since the inverter device supplies the motor to the motor in the air conditioner, the peak value of the power source waveform will not be more than twice the 600V class (peak value), and the winding of the motor The influence on the lifetime is small (for example, see Patent Document 1).

実公平５−１０４８１号公報（第２頁、図１）Japanese Utility Model Publication No. 5-10481 (2nd page, FIG. 1)

しかしながら、前述した特許文献１に記載の技術では、艤装線が交流電源用と直流電源用の２系統を艤装する必要があり、そのため、鉄道車両側の質量増加となり悪影響を与える虞があった。   However, in the technique described in Patent Document 1 described above, it is necessary to equip two systems for the AC power source and the DC power source for the armored wire. Therefore, there is a risk of an increase in mass on the railway vehicle side and an adverse effect.

本発明は、前記のような課題を解決するためになされたものであり、多電源式鉄道車両であっても艤装線を共有化（１系統）して鉄道車両側の質量増加を抑えると共に、それに対応できる空気調和機を提供でき、また、補助電源装置の軽量化、省スペース化を図ることのできる多電源式鉄道車両用の空調電源システムを提供することを目的とする。   The present invention was made in order to solve the above-described problems, and even in a multi-power-supply railway vehicle, the lining line is shared (one system) to suppress an increase in mass on the railway vehicle side, An object of the present invention is to provide an air conditioner system for a multi-power-source railway vehicle that can provide an air conditioner that can cope with this, and can reduce the weight and space of an auxiliary power supply device.

本発明に係る多電源式鉄道車両用の空調電源システムは、電源の異なる区間を跨がる架線からの電圧が交流の高電圧のときに低圧の交流電圧に降圧するトランスと、トランスにより降圧された低圧の交流電圧が入力されたときには、その交流電圧を出力し、前記架線からの電圧が直流の高電圧のときには、その高電圧を直接取り込んで低圧の直流電圧に変換する補助電源装置と、補助電源装置からの直流電圧が入力されたときに所定の直流電圧に変換し、補助電源装置からの前記交流電圧が入力されたときには前記直流電圧と同じ所定の直流電圧に変換する整流部、及び前記整流部からの直流電圧を交流電圧に変換し、冷凍サイクル装置の駆動部に供給する周波数可変部を有する空気調和機とを備えたものである。 The air conditioning power supply system for a multi-power rail vehicle according to the present invention includes a transformer that steps down to a low AC voltage when the voltage from an overhead line that crosses different sections of the power source is an AC high voltage, and a step-down by the transformer. When a low-voltage AC voltage is input, the AC voltage is output, and when the voltage from the overhead wire is a DC high voltage , an auxiliary power supply device that directly takes the high voltage and converts it into a low- voltage DC voltage; A rectifying unit that converts a DC voltage from the auxiliary power supply device into a predetermined DC voltage when input, and converts the AC voltage from the auxiliary power supply device into a predetermined DC voltage that is the same as the DC voltage; and An air conditioner having a frequency variable unit that converts a DC voltage from the rectifying unit into an AC voltage and supplies the AC voltage to a driving unit of the refrigeration cycle apparatus.

本発明によれば、補助電源装置は、トランスにより降圧された低圧の交流電圧が入力されたときには、その交流電圧を空気調和機に出力し、架線からの電圧が直流の高電圧のときには、その高電圧を直接取り込んで低圧の直流電圧に変換して空気調和機に出力するようにしている。これにより、補助電源装置にインバーター装置が不要になり、また、低圧の交流電圧を直流にするＡＣ／ＤＣコンバーターが不要になるため、補助電源装置の軽量化、省スペース化に寄与できる。 According to the present invention, the auxiliary power supply, when an AC voltage of the low voltage stepped down by the transformer is input, outputs the AC voltage to the air conditioner, when the high-voltage voltage DC from the overhead wire, the incorporating a high voltage directly into a DC voltage of the low pressure and to output to the air conditioner. This eliminates the need for an inverter device in the auxiliary power supply and eliminates the need for an AC / DC converter that converts a low-voltage AC voltage into a direct current, thereby contributing to weight reduction and space saving of the auxiliary power supply .

実施の形態１に係る多電源式鉄道車両用の空調電源システムを示すブロック図である。It is a block diagram which shows the air-conditioning power supply system for multi-power-supply type rail vehicles which concerns on Embodiment 1. FIG. 図１に示す空気調和機の概略ブロック構成図である。It is a schematic block block diagram of the air conditioner shown in FIG. 実施の形態２に係る多電源式鉄道車両用の空調電源システムを示すブロック図である。It is a block diagram which shows the air-conditioning power supply system for multiple power supply type rail vehicles which concerns on Embodiment 2. FIG. 図３に示す空気調和機の概略ブロック構成図である。It is a schematic block block diagram of the air conditioner shown in FIG.

実施の形態１．
図１は実施の形態１に係る多電源式鉄道車両用の空調電源システムを示すブロック図である。
図１において、鉄道車両１にパンタグラフ２を介して電源を供給する架線３は、例えばＤＣ１５００Ｖ、ＤＣ３０００Ｖ、ＡＣ１５０００Ｖ、ＡＣ２５０００Ｖの各区間を跨がる４電源となっている。 Embodiment 1 FIG.
FIG. 1 is a block diagram showing an air-conditioning power supply system for a multi-power-supply railway vehicle according to the first embodiment.
In FIG. 1, the overhead line 3 that supplies power to the railway vehicle 1 via the pantograph 2 has four power sources that straddle sections of, for example, DC 1500 V, DC 3000 V, AC 15000 V, and AC 25000 V.

鉄道車両１の空調電源システムは、鉄道車両１がＤＣ１５００Ｖ、ＤＣ３０００Ｖの直流電圧を電源として走行しているときにその直流電圧を直接取り込んで低圧の直流電圧（例えば、ＤＣ６００Ｖ級の直流電圧）に変換し、また、鉄道車両１がＡＣ１５０００Ｖ、ＡＣ２５０００Ｖの交流電圧を電源として走行しているときに、トランス４により降圧された交流電圧（例えば、単相８００Ｖ級の交流電圧）を前記直流電圧と同じ低圧の直流電圧に変換する補助電源装置５と、鉄道車両１の例えば各屋根に搭載され、補助電源装置５と１系統の艤装線６を介して接続された複数の空気調和機１０を備えている。   The air conditioning power supply system of the railway vehicle 1 directly takes the DC voltage when the railway vehicle 1 is running with DC 1500V and DC 3000V as the power source and converts it into a low-voltage DC voltage (for example, DC 600V class DC voltage). In addition, when the railway vehicle 1 is running with AC voltage of AC15000V and AC25000V as the power source, the AC voltage stepped down by the transformer 4 (for example, single-phase 800V class AC voltage) is the same low voltage as the DC voltage. Auxiliary power supply device 5 that converts the direct current voltage into a plurality of air conditioners 10 that are mounted on, for example, each roof of the railway vehicle 1 and are connected to the auxiliary power supply device 5 through a single line of outfitting 6. .

補助電源装置５は、ＤＣ１５００Ｖ、ＤＣ３０００Ｖの直流電圧が入力されたときに、低圧のＤＣ６００Ｖ級の直流電圧に変換するＤＣ／ＤＣコンバーター、単相８００Ｖ級の交流電圧が入力されたときには、低圧のＤＣ６００Ｖ級に変換するＡＣ／ＤＣコンバーター等を備えている。補助電源装置５により変換されたＤＣ６００Ｖ級の直流電圧は、鉄道車両１に艤装された艤装線６を介して空気調和機１０に供給される。艤装線６は、空気調和機１０毎に渡り配線となっている。   The auxiliary power supply 5 is a DC / DC converter that converts DC voltage of DC 1500V and DC 3000V to DC 600V class DC voltage of low voltage when a DC voltage of DC 1500V and DC 3000V is input. AC / DC converter etc. to convert to the class. The DC 600V class DC voltage converted by the auxiliary power supply device 5 is supplied to the air conditioner 10 through the outfitting line 6 installed in the railway vehicle 1. The outfitting wire 6 is a wiring for each air conditioner 10.

図２は図１に示す空気調和機の概略ブロック構成図である。
空気調和機１０は、艤装線６が接続された２入力端子１１、インバーター装置１２、冷凍サイクル装置等を備えている。冷凍サイクル装置は、例えば、圧縮機１３、送風機１５を有する凝縮熱交換器１４、キャピラリチューブよりなる減圧装置１６、送風機１８を有する蒸発熱交換器１７等が冷媒管１９により順次に接続されて構成されている。なお、圧縮機１３の吐出側に四方弁を設けて冷房運転と暖房運転の切替可能な冷凍サイクル装置でもよい。前述のインバーター装置１２は、ＤＣ６００Ｖ級の直流電圧を所定の三相交流電圧に変換し、冷凍サイクル装置の駆動部である圧縮機１３、送風機１５、１８の各電動機に供給する。 FIG. 2 is a schematic block diagram of the air conditioner shown in FIG.
The air conditioner 10 includes a two-input terminal 11 to which the rigging wire 6 is connected, an inverter device 12, a refrigeration cycle device, and the like. The refrigeration cycle apparatus includes, for example, a compressor 13, a condensing heat exchanger 14 having a blower 15, a pressure reducing device 16 having a capillary tube, an evaporating heat exchanger 17 having a blower 18, and the like sequentially connected by a refrigerant pipe 19. Has been. Note that a refrigeration cycle apparatus that can be switched between a cooling operation and a heating operation by providing a four-way valve on the discharge side of the compressor 13 may be used. The inverter device 12 converts a DC 600V class DC voltage into a predetermined three-phase AC voltage and supplies it to the motors of the compressor 13 and the blowers 15 and 18 which are driving units of the refrigeration cycle apparatus.

前記のように構成された空調電源システムにおいては、例えば、鉄道車両１がＤＣ１５００Ｖ、ＤＣ３０００Ｖの各区間を走行しているときには、補助電源装置５は、その直流電圧を直接取り込んで、ＤＣ／ＤＣコンバーターにより低圧のＤＣ６００Ｖ級に変換し、艤装線６を介して複数の空気調和機１０に供給する。また、鉄道車両１が直流区間からＡＣ１５０００Ｖ、ＡＣ２５０００Ｖの交流区間を走行しているときには、トランス４がその交流電圧を単相８００Ｖ級の交流電圧に降圧して補助電源装置５に供給する。この時、補助電源装置５は、単相８００Ｖ級の交流電圧をＡＣ／ＤＣコンバーターによりＤＣ６００Ｖ級の直流電圧に変換し、艤装線６を介して複数の空気調和機１０に供給する。この場合、艤装線６では直流電圧の渡しとなるため、艤装線６内で電源電圧に異常なピーク電圧の発生がなくなる。   In the air-conditioning power supply system configured as described above, for example, when the railway vehicle 1 is traveling in each section of DC 1500V and DC 3000V, the auxiliary power supply device 5 directly takes in the DC voltage, and the DC / DC converter Is converted to a low pressure DC 600 V class and supplied to the plurality of air conditioners 10 via the rigging wire 6. Further, when the railway vehicle 1 is traveling in the AC section of AC15000V and AC25000V from the DC section, the transformer 4 steps down the AC voltage to a single-phase 800V class AC voltage and supplies it to the auxiliary power supply device 5. At this time, the auxiliary power supply device 5 converts the single-phase 800 V class AC voltage into a DC 600 V class DC voltage by the AC / DC converter, and supplies the DC voltage to the plurality of air conditioners 10 via the equipment line 6. In this case, since a DC voltage is passed through the equipping line 6, an abnormal peak voltage is not generated in the power supply voltage within the equipping line 6.

一方、各空気調和機１０のインバーター装置１２は、２入力端子１１を介して入力されるＤＣ６００Ｖ級の直流電圧を所定の交流電圧に変換し、冷凍サイクル装置の圧縮機１３、送風機１５、１８の各電動機に供給する。   On the other hand, the inverter device 12 of each air conditioner 10 converts the DC 600V class DC voltage input via the two input terminals 11 into a predetermined AC voltage, and the compressor 13 and the blowers 15 and 18 of the refrigeration cycle apparatus. Supply to each motor.

なお、交流区間としてＡＣ１５０００Ｖ、ＡＣ２５０００Ｖとしたが、ＡＣ１２５００Ｖ／２５Ｈｚと周波数が低い交流区間の場合もある。鉄道車両１がその交流区間を走行しているときには、トランス４が単相８００Ｖ級の交流電圧に降圧し、補助電源装置５が単相８００Ｖ級の交流電圧をＤＣ６００Ｖ級の直流電圧に変換し、艤装線６を介して複数の空気調和機１０に供給する。   In addition, although AC15000V and AC25000V were set as the AC section, there may be an AC section with a low frequency of AC12500V / 25Hz. When the railway vehicle 1 is traveling in the AC section, the transformer 4 steps down to a single-phase 800V class AC voltage, and the auxiliary power supply 5 converts the single-phase 800V class AC voltage into a DC 600V class DC voltage. It supplies to the some air conditioner 10 via the rigging wire 6. FIG.

以上のように実施の形態１によれば、鉄道車両１が電源の異なる区間（交流区間／直流区間）を走行していても、補助電源装置５からＤＣ６００Ｖ級の直流電圧を空気調和機１０に供給し、インバーター装置１２により三相交流化している。そのため、三相電源で発生する電圧のピーク値の異常な増幅を抑えることが可能になり、空気調和機１０用の電動機の絶縁にやさしい電源を供給することが可能になっている。
補助電源装置５からＤＣ６００Ｖ級の直流電圧を空気調和機１０に出力するようにしているので、補助電源装置５内のインバーター装置が不要になり、小型軽量化に寄与できる。また、艤装線６が１系統で共有化しているため、鉄道車両１の軽量化に寄与できる。 As described above, according to the first embodiment, even if the railway vehicle 1 is traveling in different sections of power supply (AC section / DC section), a DC 600V DC voltage is supplied from the auxiliary power supply 5 to the air conditioner 10. The three-phase alternating current is supplied by the inverter device 12. Therefore, it is possible to suppress abnormal amplification of the peak value of the voltage generated by the three-phase power source, and it is possible to supply a power source that is easy to insulate the electric motor for the air conditioner 10.
Since the DC voltage of DC600V class is output from the auxiliary power supply 5 to the air conditioner 10, the inverter device in the auxiliary power supply 5 becomes unnecessary, which can contribute to reduction in size and weight. Moreover, since the outfitting line 6 is shared by one system, it can contribute to weight reduction of the railway vehicle 1.

また、空気調和機１０内にＤＣ６００Ｖ級の直流電圧対応のインバーター装置１２を備えているため、空気調和機１０内の圧縮機１３や熱交換器１４、１７の送風機１５、１８の電動機の回転数を制御し省エネ運転やきめ細かな温度制御を行うことが可能になり、鉄道車両１内の快適性の向上に寄与できる。架線３がＡＣ１２５００Ｖ／２５Ｈｚと周波数が低い交流区間の場合も含め架線３の電源状況にかかわらず、電動機の周波数を６０Ｈｚ以上に上げることで空調能力を大きくできるため、空気調和機１０の小型軽量化に寄与できる。   In addition, since the air conditioner 10 is provided with an inverter device 12 corresponding to a DC voltage of DC 600 V class, the rotation speed of the motors of the compressors 13 and the blowers 15 and 18 of the heat exchangers 14 and 17 in the air conditioner 10. It is possible to perform energy-saving operation and fine temperature control, thereby contributing to improvement of comfort in the railway vehicle 1. The air conditioner 10 can be made smaller and lighter because the air conditioning capacity can be increased by raising the frequency of the motor to 60 Hz or higher, regardless of the power supply status of the overhead line 3, including when the overhead line 3 is AC 12500 V / 25 Hz and the frequency is low. Can contribute.

実施の形態２．
図３は実施の形態２に係る多電源式鉄道車両用の空調電源システムを示すブロック図である。
図３において、鉄道車両１にパンタグラフ２を介して電源を供給する架線３は、実施の形態１と同様に、ＤＣ１５００Ｖ、ＤＣ３０００Ｖ、ＡＣ１５０００Ｖ、ＡＣ２５０００Ｖの各区間を跨がる４電源となっている。 Embodiment 2. FIG.
FIG. 3 is a block diagram showing an air-conditioning power supply system for a multi-power-supply railway vehicle according to the second embodiment.
In FIG. 3, the overhead line 3 that supplies power to the railway vehicle 1 via the pantograph 2 has four power sources that straddle sections of DC 1500 V, DC 3000 V, AC 15000 V, and AC 25000 V, as in the first embodiment.

鉄道車両１の空調電源システムは、鉄道車両１がＤＣ１５００Ｖ、ＤＣ３０００Ｖの直流電圧を電源として走行しているときにその直流電圧を直接取り込んで低圧の直流電圧（例えば、ＤＣ６００Ｖ級の直流電圧）に変換し、また、鉄道車両１がＡＣ１５０００Ｖ、ＡＣ２５０００Ｖの交流電圧を電源として走行しているときに、トランス４により降圧された交流電圧（例えば、単相４００Ｖ級の交流電圧）が入力されたときにはその交流電圧を出力する補助電源装置５と、鉄道車両１の例えば各屋根に搭載され、補助電源装置５と艤装線６を介して接続された複数の空気調和機１０を備えている。   The air conditioning power supply system of the railway vehicle 1 directly takes the DC voltage when the railway vehicle 1 is running with DC 1500V and DC 3000V as the power source and converts it into a low-voltage DC voltage (for example, DC 600V class DC voltage). Further, when the railway vehicle 1 is running with AC 15000V and AC 25000V AC voltages as the power source, when an AC voltage stepped down by the transformer 4 (for example, a single-phase 400V class AC voltage) is input, the AC An auxiliary power supply device 5 that outputs a voltage and a plurality of air conditioners 10 that are mounted on, for example, each roof of the railway vehicle 1 and are connected to the auxiliary power supply device 5 via the lining wire 6 are provided.

補助電源装置５は、ＤＣ１５００Ｖ、ＤＣ３０００Ｖの直流電圧が入力されたときに、低圧のＤＣ６００Ｖ級の直流電圧に変換するＤＣ／ＤＣコンバーターを備えている。また、補助電源装置５は、前述したように、単相４００Ｖ級の交流電圧が入力されたときには、その交流電圧を空気調和機１０に出力する。補助電源装置５により変換されたＤＣ６００Ｖ級の直流電圧、又は単相４００Ｖ級の交流電圧は、鉄道車両１に艤装された艤装線６を介して空気調和機１０に供給される。艤装線６は、空気調和機１０毎に渡り配線となっている。   The auxiliary power supply device 5 includes a DC / DC converter that converts a DC voltage of DC 1500 V and DC 3000 V into a low-voltage DC 600 V class DC voltage. In addition, as described above, when a single-phase 400 V class AC voltage is input, the auxiliary power supply device 5 outputs the AC voltage to the air conditioner 10. The DC 600V class DC voltage converted by the auxiliary power supply 5 or the single-phase 400V class AC voltage is supplied to the air conditioner 10 via the outfitting line 6 installed in the railway vehicle 1. The outfitting wire 6 is a wiring for each air conditioner 10.

図４は図３に示す空気調和機の概略ブロック構成図である。
空気調和機１０は、艤装線６が接続された３入力端子１１、インバーター装置１２、冷凍サイクル装置等を備えている。冷凍サイクル装置は、実施の形態１と同様に、圧縮機１３、送風機１５を有する凝縮熱交換器１４、キャピラリチューブよりなる減圧装置１６、送風機１８を有する蒸発熱交換器１７等が冷媒管１９により順次に接続されて構成されている。なお、圧縮機１３の吐出側に四方弁を設けて冷房運転と暖房運転の切替可能な冷凍サイクル装置でもよい。 FIG. 4 is a schematic block diagram of the air conditioner shown in FIG.
The air conditioner 10 includes a three-input terminal 11 to which the rigging wire 6 is connected, an inverter device 12, a refrigeration cycle device, and the like. As in the first embodiment, the refrigeration cycle apparatus includes a compressor 13, a condensing heat exchanger 14 having a blower 15, a decompression device 16 having a capillary tube, an evaporating heat exchanger 17 having a blower 18, and the like through a refrigerant pipe 19. Sequentially connected. Note that a refrigeration cycle apparatus that can be switched between a cooling operation and a heating operation by providing a four-way valve on the discharge side of the compressor 13 may be used.

前述のインバーター装置１２は、整流部１２ａと周波数可変部１２ｂを備えている。整流部１２ａは、例えば三相全波整流回路と、三相全波整流回路からの出力を所定の直流電圧に変換する回路を備えている。その整流部１２ａは、例えば、３入力端子１１のうち両端の端子間に直流電圧が入力されたときには所定の直流電圧に変換し、同端子に単相４００Ｖ級の交流電圧が入力されたときには全波整流して所定の直流電圧に変換し、３入力端子１１に三相交流電圧が入力されたときには全波整流して所定の直流電圧に変換する。その三相交流電圧は、補助電源装置５以外の外部電源からの供給であっても良い。その外部電源は、例えば空気調和機１０を鉄道車両１に搭載する前の工場での運転試験を行うときの電源である。   The aforementioned inverter device 12 includes a rectifying unit 12a and a frequency variable unit 12b. The rectifying unit 12a includes, for example, a three-phase full-wave rectifier circuit and a circuit that converts an output from the three-phase full-wave rectifier circuit into a predetermined DC voltage. The rectifying unit 12a converts, for example, when a DC voltage is input between the terminals at both ends of the three input terminals 11, and converts the DC voltage to a predetermined DC voltage, and when a single-phase 400V class AC voltage is input to the same terminal, Wave rectification converts the voltage into a predetermined DC voltage. When a three-phase AC voltage is input to the three input terminals 11, full-wave rectification is performed to convert the voltage into a predetermined DC voltage. The three-phase AC voltage may be supplied from an external power source other than the auxiliary power device 5. The external power source is a power source for performing an operation test in a factory before the air conditioner 10 is mounted on the railway vehicle 1, for example.

前記のように構成された空調電源システムにおいては、例えば、鉄道車両１がＤＣ１５００Ｖ、ＤＣ３０００Ｖの各区間を走行しているときには、補助電源装置５は、その直流電圧を直接取り込んで、ＤＣ／ＤＣコンバーターにより低圧のＤＣ６００Ｖ級に変換し、艤装線６を介して複数の空気調和機１０に供給する。また、鉄道車両１が直流区間からＡＣ１５０００Ｖ、ＡＣ２５０００Ｖの交流区間を走行しているときには、トランス４がその交流電圧を単相４００Ｖ級の交流電圧に降圧して補助電源装置５に供給する。この時、補助電源装置５は、単相４００Ｖ級の交流電圧をそのまま艤装線６を介して複数の空気調和機１０に供給する。この場合、艤装線６では直流電圧と交流電圧の渡しとなり、矩形波電源電圧渡しではないため、艤装線６内で電源電圧に異常なピーク電圧の発生がなくなる。   In the air-conditioning power supply system configured as described above, for example, when the railway vehicle 1 is traveling in each section of DC 1500V and DC 3000V, the auxiliary power supply device 5 directly takes in the DC voltage, and the DC / DC converter Is converted to a low pressure DC 600 V class and supplied to the plurality of air conditioners 10 via the rigging wire 6. Further, when the railway vehicle 1 is traveling in the AC section of AC15000V and AC25000V from the DC section, the transformer 4 steps down the AC voltage to a single-phase 400V class AC voltage and supplies it to the auxiliary power supply device 5. At this time, the auxiliary power supply device 5 supplies a single-phase 400 V class AC voltage to the plurality of air conditioners 10 as it is through the equipping line 6. In this case, since a DC voltage and an AC voltage are passed through the equipping line 6 and not a rectangular wave power supply voltage, an abnormal peak voltage is not generated in the power supply voltage within the equipping line 6.

一方、各空気調和機１０の整流部１２ａは、３入力端子１１のうち両端の端子間に直流電圧が入力されたときにはさらに整流すると共に、その出力を所定の直流電圧に変換して周波数可変部１２ｂに出力する。また、同端子に単相４００Ｖ級の交流電圧が入力されたときには全波整流すると共に、所定の直流電圧に変換して周波数可変部１２ｂに出力する。周波数可変部１２ｂは、整流部１２ａからの直流電圧を三相の交流電圧に変換し、冷凍サイクル装置の駆動部である圧縮機１３及び送風機１５、１８に供給する。   On the other hand, the rectifying unit 12a of each air conditioner 10 further rectifies when a DC voltage is input between the terminals at both ends of the three input terminals 11, and converts the output into a predetermined DC voltage to convert the frequency into a frequency variable unit. To 12b. When a single-phase 400V class AC voltage is input to the same terminal, full-wave rectification is performed, and the voltage is converted to a predetermined DC voltage and output to the frequency variable unit 12b. The frequency variable unit 12b converts the DC voltage from the rectifying unit 12a into a three-phase AC voltage and supplies it to the compressor 13 and the blowers 15 and 18 that are driving units of the refrigeration cycle apparatus.

なお、交流区間には、実施の形態１と同様に、ＡＣ１２５００Ｖ／２５Ｈｚと周波数が低い区間の場合もある。鉄道車両１がその交流区間を走行しているときには、トランス４が単相４００Ｖ級の交流電圧に降圧し、補助電源装置５がその単相４００Ｖ級の交流電圧を艤装線６を介して複数の空気調和機１０に供給する。   Note that the AC section may be a section with a frequency as low as AC12500 V / 25 Hz, as in the first embodiment. When the railway vehicle 1 is traveling in the AC section, the transformer 4 steps down to a single-phase 400V class AC voltage, and the auxiliary power supply 5 supplies the single-phase 400V class AC voltage to the Supply to the air conditioner 10.

以上のように実施の形態２によれば、補助電源装置５は、鉄道車両１が直流区間を走行しているとき、出力をＤＣ６００Ｖ級の直流電圧とし、また、鉄道車両１が交流区間を走行しているときには、トランス４により降圧された単相４００Ｖ級の交流電圧をそのまま出力するようにしている。これにより、補助電源装置５内のインバーター装置が不要になり、また、単相電源を直流にするＡＣ／ＤＣコンバーターが不要になるため、補助電源装置５をより小型軽量化できる。   As described above, according to the second embodiment, when the railway vehicle 1 is traveling in the DC section, the auxiliary power supply device 5 outputs DC 600V class DC voltage and the railway vehicle 1 travels in the AC section. In this case, a single-phase 400 V class AC voltage stepped down by the transformer 4 is output as it is. This eliminates the need for an inverter device in the auxiliary power supply 5 and eliminates the need for an AC / DC converter that turns a single-phase power supply into a direct current, thereby making the auxiliary power supply 5 smaller and lighter.

また、空気調和機１０に内蔵されたインバーター装置１２の整流部１２ａを、直流電源にも単相交流電源、３相交流電源にも対応可能としているため、１つの３入力端子１１だけで済む。これにより、艤装線６を１系統で共有化でき、鉄道車両１の軽量化に寄与できる。   Moreover, since the rectification part 12a of the inverter apparatus 12 incorporated in the air conditioner 10 can respond to a DC power supply, a single-phase AC power supply, or a 3-phase AC power supply, only one three-input terminal 11 is required. Thereby, the outfitting line 6 can be shared by one system, and it can contribute to the weight reduction of the rail vehicle 1. FIG.

また、整流部１２ａに三相全波整流回路を設けているので、工場での例えば３相４００Ｖの交流電圧を接続可能になり、保守時の電源を準備する必要がなくなるメリットがある。   Further, since the three-phase full-wave rectifier circuit is provided in the rectifying unit 12a, it is possible to connect an AC voltage of, for example, three-phase 400V in a factory, and there is an advantage that it is not necessary to prepare a power source for maintenance.

さらに、空気調和機１０内にインバーター装置１２を内蔵しているため、空気調和機１０内の圧縮機１３や熱交換器１４、１７の送風機１５、１８の電動機の回転数を制御し省エネ運転やきめ細かな温度制御を行うことが可能になり、鉄道車両１内の快適性の向上に寄与できる。架線３がＡＣ１２５００Ｖ／２５Ｈｚと周波数が低い交流区間の場合も含め架線３の電源状況にかかわらず、電動機の周波数を６０Ｈｚ以上に上げることで空調能力を大きくできるため、空気調和機１０の小型軽量化に寄与できる。   Further, since the inverter device 12 is built in the air conditioner 10, the rotational speed of the compressor 13 in the air conditioner 10 and the motors 15 and 18 in the heat exchangers 14 and 17 are controlled to save energy. Fine temperature control can be performed, which can contribute to improvement of comfort in the railway vehicle 1. The air conditioner 10 can be made smaller and lighter because the air conditioning capacity can be increased by raising the frequency of the motor to 60 Hz or higher, regardless of the power supply status of the overhead line 3, including when the overhead line 3 is AC 12500 V / 25 Hz and the frequency is low. Can contribute.

なお、実施の形態２では、空気調和機１０に３入力端子１１を設け、さらに、整流部１２ａに三相全波整流回路を設けて、外部電源からの三相交流電圧も整流できるようにしたが、三相全波整流回路に代えて単相全波整流回路としても良い。その場合、外部電源からの三相交流電圧を入力できなくなるが、前述したように、補助電源装置５をより小型軽量化、艤装線６の１系統による鉄道車両１の軽量化に寄与できる。   In the second embodiment, the air conditioner 10 is provided with the three input terminals 11, and the rectifier 12a is provided with a three-phase full-wave rectifier circuit so that the three-phase AC voltage from the external power source can be rectified. However, a single-phase full-wave rectifier circuit may be used instead of the three-phase full-wave rectifier circuit. In that case, although it becomes impossible to input the three-phase AC voltage from the external power supply, as described above, the auxiliary power supply device 5 can be reduced in size and weight, and the rail vehicle 1 can be reduced in weight by one system of the rigging wire 6.

１ 鉄道車両、２ パンタグラフ、３ 架線、４ トランス、５ 補助電源装置、６ 艤装線、１０ 空気調和機、１１ 入力端子又は３入力端子、１２ インバーター装置、１２ａ 整流部、１２ｂ 周波数可変部、１３ 圧縮機、１４ 凝縮熱交換器、１５ 送風機、１６ 減圧装置、１７ 蒸発熱交換器、１８ 送風機、１９ 冷媒管。   DESCRIPTION OF SYMBOLS 1 Railway vehicle, 2 Pantograph, 3 Overhead wire, 4 Transformer, 5 Auxiliary power supply device, 6 Outfitting wire, 10 Air conditioner, 11 Input terminal or 3 input terminal, 12 Inverter device, 12a Rectification part, 12b Frequency variable part, 13 Compression Machine, 14 condensing heat exchanger, 15 blower, 16 decompression device, 17 evaporating heat exchanger, 18 blower, 19 refrigerant pipe.

Claims (3)

電源の異なる区間を跨がる架線からの電圧が交流の高電圧のときに低圧の交流電圧に降圧するトランスと、
前記トランスにより降圧された低圧の交流電圧が入力されたときには、その交流電圧を出力し、前記架線からの電圧が直流の高電圧のときには、その高電圧を直接取り込んで低圧の直流電圧に変換する補助電源装置と、
前記補助電源装置からの前記直流電圧が入力されたときに所定の直流電圧に変換し、前記補助電源装置からの前記交流電圧が入力されたときには前記直流電圧と同じ所定の直流電圧に変換する整流部、及び前記整流部からの直流電圧を交流電圧に変換し、冷凍サイクル装置の駆動部に供給する周波数可変部を有する空気調和機と
を備えたことを特徴とする多電源式鉄道車両用の空調電源システム。 A transformer that steps down to a low-voltage AC voltage when the voltage from the overhead line across different sections of the power source is an AC high voltage;
When a low-voltage AC voltage stepped down by the transformer is input, the AC voltage is output. When the voltage from the overhead wire is a DC high voltage , the high voltage is directly taken and converted into a low-voltage DC voltage. An auxiliary power supply,
Converting said converted into a predetermined DC voltage when the DC voltage is input, the same predetermined DC voltage and the DC voltage when the AC voltage from the auxiliary power unit is input from the auxiliary power unit A multi-power-supply railway vehicle comprising: a rectifying unit that converts the DC voltage from the rectifying unit into an AC voltage, and an air conditioner having a frequency variable unit that supplies the AC voltage to a driving unit of the refrigeration cycle apparatus Air conditioning power supply system. 前記整流部は、前記補助電源装置以外の外部電源からの三相交流電圧が入力されたときに所定の直流電圧に変換し、前記周波数可変部に供給することを特徴とする請求項１記載の多電源式鉄道車両用の空調電源システム。 The rectification section, the converted into a predetermined DC voltage when the three-phase AC voltage from an external power source other than the auxiliary power supply is input, according to claim 1, wherein the supply to the frequency variable unit Air-conditioning power supply system for multi-power rail vehicles. 前記補助電源装置と該補助電源装置に近い空気調和機、及び空気調和機の間は、鉄道車両に艤装された１系統の艤装線により接続されていることを特徴とする請求項１又は２記載の多電源式鉄道車両用の空調電源システム。 The auxiliary power unit and the air conditioner close to the auxiliary power unit, and between the air conditioner, according to claim 1 or 2, characterized in that it is connected by equipment line of one system, which is outfitting railcars Air-conditioning power supply system for multi-power rail vehicles.
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CN201280026855.0A CN103561992B (en) 2011-06-03 2012-05-29 The air conditioner power source system of many power types rolling stock
PCT/JP2012/003494 WO2012164907A1 (en) 2011-06-03 2012-05-29 Air-conditioner power supply system for multi-power supply type railcar
EP12793265.5A EP2716487B1 (en) 2011-06-03 2012-05-29 Air-conditioner power supply system for multi-power supply type railcar
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